Micro-Synthesis of Red and Near-Infrared Luminescent Dyes and Determination of Their Luminescent Properties
In this paper,two kinds of functional dyes with both photoluminescence and chemiluminescence properties were synthesized under the same reaction conditions through a micro-reaction of tens of milligrams.Red dyes have red light emitting properties,while blue dyes have near infrared emitting properties.The ultraviolet-visible absorption spectrum,fluorescence emission spectrum and chemiluminescence spectrum were measured by ultraviolet spectrometer and fluorescence spectrometer.In this experiment,the progress of the reaction was monitored by thin-layer chromatography,and the product was separated and purified by preparative thin-layer chromatography to minimize the possible pollution caused by dye synthesis.The photoluminescence phenomenon can be visually observed by using red and green laser pointers to irradiate the dye solution and the dye-containing film respectively.Green laser light can be absorbed by red dyes and converted into red light through the phenomenon of photoluminescence.The red laser can be directly converted into near-infrared luminescence by near-infrared luminescent dyes.In the chemiluminescent system,the two dyes emit bright red light and near-infrared light,respectively.This experiment introduces optical functional materials into undergraduate teaching experiments,which not only trains students'micro-organic synthesis and separation techniques,but also stimulates students'curiosity and enhances the fun of experiments.
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